<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #abc{color: green}
        .gfk{color: blue}
        h1,h2{background-color: yellow}
        [type]{color:pink}
        [type="submit"]{background-color: red}
        *{
            border:1px solid blue;
        }
    </style>
</head>
<body>
<ul>
    <li id="abc">张学友</li>
    <li class="gfk">刘德华</li>
    <li>郭富城</li>
</ul>
<h1 class="gfk">悟空</h1
><h1>八戒</h1>
<h1>沙僧</h1>
<h2>刘备</h2>
<input type="submit" value="提交按钮">
<input type="button" value="普通按钮">
</body>
</html>